Patent US3690785A successfully refreshed from Google Patents.
US3690785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring plate sealing system
Assignee: Westinghouse Electric Corp
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Filing: 1970-12-17
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Granted: 1972-09-12
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Expires: 1990-12-17
Abstract
Abstract Sealing means for the ends of an enclosure defined between essentially concentric cylindrical members having different thermal expansion properties, characterized in that the sealing means is formed from segments each comprising a plate having a generally L-shaped cross section with one leg of the cross section being attached to one of the concentric members and the other leg, at right angles to the first, being spring-biased against a radially extending surface on the other member. The sealing means of the invention is designed to operate at high temperatures and will withstand large transient thermal growth differences in areas where rigid attachment of sealing elements to both members is impractical.
Inventors
- 👤 Leroger J Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:21
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
231 words
In a gas turbine, an inner stationary casing, an outer stationary casing, said casings being disposed in concentric radially spaced relation with each other, radially extending means provided on said casings securing said casings to each other, and two sets of radial sealing means extending between said inner and outer casings and disposed in axially spaced relation with each other and extending around the space between said casings to define an enclosure for coolant therebetween, one set of said radial sealing means having at least one sealing element of generally L-shaped cross-sectional configuration having a first leg portion secured to one of said casings and a second leg portion at substantially right angles to said first leg portion and in continuously biased sealing engagement at its free end with a radially-extending surface on the other of said casings, and the other set of said radial sealing means having a second sealing element also of generally L-shaped cross-sectional configuration having a first leg portion secured to said other casing and a second leg portion at substantially right angles to said first leg portion and in continuously biased sealing engagement at its free end with a radially extending surface on said one casing, the first leg portions of said sealing elements being preset whereby the second leg portions are continuously urged under spring bias into engagement with their associated radial surfaces during operation.
Claim 2
Dependent Claim
231 words
In a gas turbine, an inner stationary casing, an outer stationary casing, said casings being disposed in concentric radially spaced relation with each other, radially extending means provided on said casings securing said casings to each other, and two sets of radial sealing means extending between said inner and outer casings and disposed in axially spaced relation with each other and extending around the space between said casings to define an enclosure for coolant therebetween, one set of said radial sealing means having at least one sealing element of generally L-shaped cross-sectional configuration having a first leg portion secured to one of said casings and a second leg portion at substantially right angles to said first leg portion and in continuously biased sealing engagement at its free end with a radially-extending surface on the other of said casings, and the other set of said radial sealing means having a second sealing element also of generally L-shaped cross-sectional configuration having a first leg portion secured to said other casing and a second leg portion at substantially right angles to said first leg portion and in continuously biased sealing engagement at its free end with a radially extending surface on said one casing, the first leg portions of said sealing elements being preset whereby the second leg portions are continuously urged under spring bias into engagement with their associated radial surfaces during operation.
Claim 3
Dependent Claim
24 words
The structure of claim 1 wherein each set of radial seal means includes a second leg portion which is shorter than said first leg.
Claim 4
Dependent Claim
44 words
The structure of claim 2 wherein the respective leg portions of the sealing elements are parallel to each other and define a chamber between the elements, the second leg portion of each element being spring-biased toward the first leg portion of the other element.
Claim 5
Dependent Claim
27 words
The structure of claim 1 wherein each set includes a plurality of arcuate sealing elements extending circumferentially around the end of the enclosure defined between said casing.
Claim 6
Dependent Claim
15 words
The structure of claim 4 including seal strips covering seams between said arcuate sealing elements.
Claim 7
Dependent Claim
25 words
The structure of claim 5 wherein said seal strips are attached to an associated arcuate segment and overlap a seam and an adjacent arcuate segment.
Claim 8
Dependent Claim
28 words
The structure of claim 1 wherein each set of said radial sealing means includes a plurality of spaced sealing members superimposed one upon the other in parallel relationship.
Claim 9
Dependent Claim
28 words
The structure recited in claim 1 wherein the enclosure comprises a plenum chamber, and means is provided for supplying said plenum chamber with a gaseous pressurized cooling fluid.
Claim 10
Dependent Claim
55 words
The structure recited in claim 8 wherein said second set of seal elements is disposed in oppositely biased engagement with one of the casings thereby to maintain a seal in the event of loss of sealing abutment of said first set of seal elements due to relative movement of said casings in axially opposed directions.
References Cited (Backward Citations)
GB221632A
Cited
GB225936A
Cited
DE451272C
Cited
US1708044A
Cited
US1778014A
Cited
US1831224A
Cited
CH291604A
Cited
FR1446923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |